Electric-cable joint.



o E f I ...WAN

]?ATENTED MAR. 28, 1905.

D. J. OHISHOLM. ELECTRIC CABLE. JOINT.

APPLICATION FILED MAY 11,1904.

NTTED STATES laten'ted Mare); 28, 1905,

PaTnNT Trice.

ELECTRIC-CABLE dOlN'il'..

SPECIFICATION forming part of Letters Patent No. 785,712, dated March28, 1905.

Application lled May l1, 1904. Serial No. 207,421.

To (LZ/f wiz/mit 'it nul/y cm1/cern:

Be it known that I, DONALD J. OHrsHoLM, a citizen of the United States,and a resident of East I-Iampton` Long Island, New York, have inventedcertain new and useful 'Improvements in Electric-Cable Joints, of whichthe following is a specitication accompanied by drawings.

This invention relates to electric-cable joints; and its objects are toimprove upon such joints, simplify their construction, and enable theends otl any desired number ot' cables to be coupled and uneou pled andsuitably tested by simply removing a protecting-cap from one end ot thecoupling-box, thereby exposing the cable ends to be reached.

Further objects o1c the invention will hereinafter appear; and to theseends the invention consists ot an electric-cable joint embodying thefeatures ot' construction, combinations of elements, and arrangement ot'parts having the general mode of operation substantiall57 as hereinafterfully describedy and claimed in this specilication and shown in theaccompanying' drawings, in which*- Figure 1 is a vertical sectional viewof a cable-joint embodying the invention. AFig. Q is a plan view of thesame with the cap removed. Fig. 3 is a vertical sectional view of amodification.

Referring to the drawings, A represents a suitable coupling-box, whichmay be otl any desired material, preferably oil metal, as iron, and Brepresents electric cables entering one end ot the box through suitableapertures (l. Suitable lilling material D, as tar, is provided aroundthe cables and between them and the sides ot the box A. The cable endsE, shown, extend beyond the iillingl material D, so that they areexposed when the cap F is removed from the box, and suitable tests maybe applied to the cables, or else they may be coupled in differentcombinations, as desired. In Figs. l and 2 the four cables are shownconnected in pairs. As shown, the ends ot the wires are bent in the formot loops or eyes G in the usual manner and held in electrical contact bymeans of the bolts H and nuts I. Preterabl y a sheet oi' suitableinsulating' material J, as glass, is arranged between the pairs ot`cable ends E, and preferably the cap F is lined with insulating materialIi. which may also be glass and adapted to extend a substantial distancealong the length ot the cable ends E, so that said ends are practicallyinclosed by insulating material on all sides. Any suitable means may beprovided for removably securing the cap ot' the box A, in this instanceinterior screwthreads being provided upon the box and exteriorcooperating threads upon the cap, although any other suitable means maybe provided for the purpose. This device is particularly adapted toaluminium cables, which cannot be soldered.

In Fig. 3 a modilied form ot' cable-joint is shown particularly adaptedto cables containingI a large number ot' conductors. By way ot'illustration three pairs ot' cables B are shown, and each pair projectsa different distance beyond the iilling material D in the box A', whilethe cap is made in sections, so that to expose the longest cable end Ethe outer section L otl the cap only is removed. To expose the shortersections ot' the cable ends E, both sections L and O ot' the cap shouldbe removed. Any desired number of cables may be used in the constructionshown in Fig. 3, and between each pair ot' cables is preferably arrangeda sheet of insulating material J, as isinglass or paratlined paper. Inthis modiiieation the box A is provided with a Aiange l), while thesection O ot' the cap has a cooperating flange Q., and the two aresuitably secured together by means ol the bolts R. The outer section Lot' the cap is also provided with a Hangt` It, adapted to cooperate withthe other [lange,S,otl the section O,while bolts T are ).novided at thisportion et the cap. Preferably, as before, the inside ot the cap islined with insulating material K, such as glass.

Obviously some vit'eatures ot' this invention may be used withoutothers, and the invention may be embodied in widelyvarying forms.

Therefore, without limiting the invention to the constructions shown anddescribed nor enumerating equivalents, I claim, and desire to secure byLetters Patent, the following:

1. An electric-cable joint, comprising a IOC Coupling-box, cablesentering one end thereof filling' material around said Cables in thebox, the ends oll the eables extending beyond the insulating material, asheet of insulating;` materlal between the exposed ends of said eaof,filling material around said Cables in the box, and a sectional eap VForthe eoui'iling-hox removably secured thereto, vfor substantially thepurposes set forth.

4. An electric-cable joint, eoinprising' a coupling-box, cablesentering' one end thereot', Iilling' material around said Cables in thebox, and a sectional eap For the coupling-box removably secured thereto,with suitable iusulation between the ends of the Cables and in saidsectional cap, 'for substantially the purposes set forth.

ln testimony whereof I have signed this g speeilieation in the presenceoi' two subseribing witnesses.

DONALD J. CHISHOLM. WTitnesses:

VAN ZAND'I, A. L. OBnmN.

